Lamp hood for electric lamps



April 8, 1930; w. L. LAlB 1,753,273

LAMP goon For: ELECTRIC LAMPS Filed July 21, 1926 Patented Apr. 8, 1939WILLIAM L. LAIB, or OAK PARK, ILLInoIs' LAM]? IIO OD FOR ELECTRIC LAMPSApplication filed July 21,

This invention relates to that class of lamp hoods in which a pluralityof cupshaped glass hood members are provided which are adapted to beconnected to form an enclosing hood or covering for an electric lamp orlamp bulb.

The-principal object of the invention is to provide a simple, economicalandeficient hood for electric lamps, and more particularly, to provide alamp hood comprising a pair of connected cup-shaped or hollow hoodmembers which are formed of glass and may be of any desired color orshade, and which are adapted to be spread apart or separatedsufficiently to permit the hood .to be placed upon or to admit anelectriclamp bulb to be enclosed or covered thereby, and to be securedtogether in position to enclose or surround such lamp bulb and to besecurely held and supported in proper position thereon,

with facility and in an efiicient manner.

Other and further objects of the invention will appear from thefollowing description and claim, and from an inspection of theaccompanying drawings, which are made a part hereof. I V

The invention consists of the features, combinations, and details ofconstruction, and arrangement of parts; herein described and claimed.

In the accompanying drawings- Figure 1 is a View in side elevation of alamp hood constructed in accordance with my invention, showing the samemounted upon and adapted to enclose a lamp bulb of an incandescentelectric lamp;

Fig. 2 is an end view of the lamp hood shown in Fig. 1, showing themeans for forming a hinged connection between the ends of the cup-shapedhood members at the closed end of the lamp hood; 7

Fig. 3 is a view in section taken through the longitudinal or axialcenter of the lamp hood and lamp'bulb shown in Fig. 1, on line 33 ofsaid figure, looking in thedirection indicated by the arrows, andshowing the hinged or flexibly connected pair of cupshaped hood membersspread apart, to permit the hood to be placed in position upon the lampbulb, in broken lines;

1926. Serial No. 123,979.

Fig. l is a transverse sectional view taken on line -l; of Fig. 1,looking in the direction indicated by the arrows, and showing theresilient means for connecting and holding the open ends of thecup-shaped hood members together and detachably in engagement with thelamp bulb; and

Fig. 5 is a detail view in elevation ofone of the'pair of cup-shaped orhollow hood members shown in Figs. 1 to l inclusive.

My improved lamp hood is suitable for use as color hood for electriclamps or lamp bulbs for lighting electric signs, or for otherelectric-lighting purposes, either indoors or out-of-doors.

In Figs. 1, 2, and 3 a, lamp hood constructed in accordance with myinvention, isshown dinary incandescent lamp bulb 3 which is mounted in alamp socket 4, said socket be ing, in turn, mounted upon a suitable sup'port 5, which'may be a lamp-supporting plate or sign board of anelectric sign h'avingany desired number of electric lamps provided withsuch hoods; or they electric lamp or lamps provided with lamp hoodsconstructed in accordance with my invention, may be mounted in anydesired or suitable manner upon any desired support or structure, andmay be of any ordinary and well know'nor suitable form.

'mounted upon and adapted to enclose an or- It is very desirable that alamp hood for electric lamps be provided which is adapted to be placedinposit-ion and removed and replaced with facility, and used under varyingconditions, in some instances requiring the lamp hood to be mounted andremoved and replaced by the use of only one hand of the operator, and tobe subjected to varying conditions of wind and weather, in places whichmay be very difficult of access.

' In constructing a lamp hood for electric lamps, in accordance with myinvention, I provide a pair of mated cup-shaped hood members 1 and 2,each formed of suitable material, and one or both of which may be formedof glass of any desired shade or color or combination of colors, andmaybe transparent or translucent in whole or in part and adapted to produceany desired color or lighting effect; or one of said hood members may beopaque or provided with a reflector surface, if desired.

The pair of mating cup-shaped hood members 1 and 2, of which my improvedlamp hood is formed, are, by preference, both of the same identicalconstruction, shape and dimensions, each being made of glass, or othersuitable material, and in the form of a hollow somewhat elongatedhemispheroid which is somewhat tapered toward its base 6 and truncatedso as to form a hollow tapered neck 7, the tapered end or base beingopen. Each of the hollow elongated hemispheroidal mating cup-shaped hoodmembers 1 and 2 has a curved U-shaped margin or edge 8 which ischamfered or beveled throughout its length and adapted to be connectedand securely held in tight, snugly fitting abutting engagement with anadjacent similarly chamfered or beveled margin or edge of its matingcupshaped hood member, the engaged edges 8 of each pair of connectedcup-shaped hood members 1 and 2 being in the same plane with the majoror longitudinal axis of a hollow somewhat elongated spheroidal lamp hood9 formed by connecting the pair of cup-shaped hood members, such lamphood being in the form of a hollow spheroid which is somewhat elongatedand tapered toward its base and truncated and open at the base ortapered end of the neck thus formed.

The lamp hood thus formed may be round at its closed end or apex whichis located at the opposite extremity from the open end or base, and isadapted to be mounted upon and securely held in position to enclose thesimilarly shaped lamp bulb 3 in connection with which the hood is to beused, and upon and by means of which it is adapted to be detachablysupported.

Each of the pair of mating cup-shaped hood members 1 and 2 is providedwith an in tegral protruding curved or hook-shaped end hinge member orlug 10 located at the apex or closed end of the lamp hood and adjacentto the corresponding curved portion of the U shaped rim or margin 8 ofthe cup-shaped hood member of which said hinge member or projecting lugforms a part, the projecting hinge members or end lugs 10 of each pairof cup-shaped hood members being curved outward in opposite directionsfrom each other, or provided with notches or recesses 11 adapted toreceive and hold in place therein a connecting link or hinge member 12which may be formed of wire bent to form connecting side link portions13 which extend across the engaged margins 8 of the pair of cup-shapedhood members 1 and 2 on opposite sides of the lugs 10, and link endportions 14 which are seated in the recesses 11 and adapted to hold thelink in operative position, and

nected cup-shaped hood members 1 and 2 to be swung or spread apart attheir open ends, for admitting the lamp bulb, and to be brought togetheror swung into position to enclose the lamp bulb and into position tocause, or to permit the rims or U-shaped margins 8 of the connectedcup-shaped hood members 1 and 2 to be secured in closely fittingengagement with each other, with the lamp bulb enclosed within the hood.

Suitable connecting means is provided, for connecting and permitting thespreading apart of the open ends of the flexibly connected cup-shapedhood members 1 and 2. For this purpose resilient connecting means isprovided which may consist of a closely wound'helical spring 15, theends of which are connected'so as to form a closed flexible resilientloop which encircles the tapered neck portions of the connectedcup-shaped hood members 1 and 2 near the open ends thereof, each of saidcup-shaped members being provided with a laterally projecting marginalshoulder or flange portion 16 on or adjacent to the open end thereof,said shoulders or flange portions 16 being, by preference, formed in oneintegral piece with the cupshaped'hood member on which they are located,respectively, and of which they form a art.

p The U-shaped margin 8 of each cup-shaped hood member 1 and 2,respectively, is, by preference chamfered or beveled, so as toeffectually close the space between the engaged margins 8 and preventthe passage of any direct rays of light from the electric lamp throughany openings which might otherwise occur between said margins.

It is desirable that the chamfered or beveledperipheral margins 8 ofboth the sectionalcup-shaped hood members 1 and 2 be alike in shape anddimensions, so that both of said hood-members may be made from one andthe same mold or identical molds, and so that said peripheral marginswill fit together properly without the necessity of making one of saidcup-shaped members male and the other female, which would requirecorrespondingly different male and female molds, or right and left hoodmembers and molds to correspond. I therefore, by preference, make theU-shaped peripheral margin 8 of each hood member 1 and 2, respectively,one-half male and the other half female, or one-half right handed, andthe other half left handed. In other words, each hood member 1 and 2,respectively, has a U-shaped beveled peripheral margin 8, one-half ofwhich has an outer projecting side margin or edge 17 and a marginalportion 18 which slopes inward to an inner recessed edge 19 and theother half of which has an inner pro jecting side margin 20 and an outerinclined marginal surface portion 21 which slopes outward to arelatively lower or depressed outer side margin or edge 22. The outerprotruding edge 17 and inner edge 19 extend from the apex 23 at theclosed end of the hood to the open end or base 6 on one side of thelongitudinal axis of the hood, forming an end shoulder 24 at the apex;and the inner protruding edge 20 and outer relatively lower or depressedside edge 22 extend from the apex 23 to the open end or base 6 on theopposite side of said longitudinal axis from said edges 17 and 19,forming an end shoulder at said apex. The end shoulders 24 and 25 at theadjacent ends of the opposite beveled side margins or inner and outerprotruding edges 20 and 17 are thus adapted to be secured in end-wiseabutting engagement with corresponding end shoulders 24 and 25 of amating hood member 1 or 2 as the case may be, and tend to prevent orlimit the movement of the closed ends of the engagedhood members 1 and 2with respect to each other.

I claim:

In a lamp hood of the class described, the

combination of a pair of cup-shaped hood members formed of glass of asuitable color and adapted to permit the passage of rays of a lighttherethrough, said pair of hood members having peripheral marginalportions normally in abutting engagement with each other, said pair ofhood members forming a sectional lamp hood having an open end and aclosed end, for enclosing a lamp bulb, an integral hinge member on andprojecting from the end marginal portion of each of said cup-shaped hoodmembers respectively, at the closed end of the hood said projectinghinge member being of identical form and having diverging outer endportions normally spaced apart and adapted to permit relative movementof said cup-shaped hood members, a metallic connecting hinge member onand forming a flexible connection between said hinge members, andresilient connecting means on and adapted to form a yielding connectionbetween the opposed open end portions of said cup-shaped hoodmembers.

Signed at Chicago, in the county of Cook and State of Illinois, this 6thday of July,

WILLIAM L. LAIB.

